Clutch.



J. K. MOKELVEY.

CLUTCH.

APPLICATION FILED MAY 9, 1911.

1,017,577, 7 Patented Feb. 13, 1912.

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J. K. MOKELVEY- CLUTCH.

APPLICATION FILED MAY 9, 1911.

Patehted Feb. 13,1912.

2 SHEETS-SHEET 2.

. Ewe/Mo's (Tune-s EM fllvey JAMES K. MGKELVEY, OF WARNOCK, OHIO.

CLUTCH.

Specification of Letters Patent.

Application filed May 9, 1911.

Patented Feb. 13, 1912.

Serial No. 625,980.

To all whom it may concern:

Be it known that I, JAMES K. MGKELVEY, a citizen of the United States, residing at \Varnock, in the county of Belmont and State of Ohio, have invented new and use ful Improvements in Clutches, of which the following is a specification.

This invention relates to improvements in clutch mechanism, the primary object of the invent-ion being to provide a combined frictional and positive clutch mechanism which is of a simple construction, which is strong, comparatively cheap to manufacture, and which will perform its functions with ease and with accuracy.

\Vith the above objects in view, and others which will appear as the nature of the improvement progresses, the invention resides in the novel construction and combination of parts hereinafter fully described and claimed.

In the drawings, accompanying this specification, there has been illustrated a simple and approved embodiment of the invention, it being understood, however, that the showing therein is merely illustrative and that changes in the minor details of construction which fall within the scope of the appended claim may be made, if desired.

In the drawings,Figure 1 is a front elevation of the clutch mechanism embodying my invention. Fig. 2 is a side elevation of the same. Fig. 3 is a central vertical longi tudinal sectional view of the same. Fig. 4 is a detail perspective view of the sleeve employed with my improvement. Fig. 5 is a front elevation of the rear wheel. is a perspective view of the sliding collar. Fig. 7 is a similar View of the shifting memher.

In the accompanying drawings, the numeral 1 designates a shaft to which is attached a fly wheel 2. Secured to the inner face of the fly wheel 2 is an annular clutch band 3. Mounted upon the shaft 1 is a sleeve 4. This sleeve is provided with a plurality of longitudinally extending ribs or projections 5, the purpose of which will presently be set forth.

The numeral 6 designates the sliding collar which has its bore formed with longitudinally extending depressed portions 7, the latter corresponding in number with the ribs or beads 5 of the sleeve 4, and with which they are adapted to engage.

The collar 6 is centrally provided with an annular enlargement 8, the same adapted to be engaged by the walls provided upon slitted shoes 9, which are pivotally connected with the opposite ends of a yoke 10 provided upon a shifting member 11.

The device is primarily adapted to be used in connection with a traction engine, but is, of course, susceptible for use in other connections, and the shifting member 10 is pivotally connected as at 12 to any desired portion of the frame of the engine. The extremity of the arm 11 is preferably bifurcated to receive a pivoted member 13 which may be secured to a lever or the like within the cab of the engine. The sliding collar 6 is provided with a plurality of pocket-s l4, and arranged within these pockets are the pin members 15. These pin members 15 are partially projected from the pockets through the medium of, helical springs 16, and the said pins aline with a plurality of openings 17 formed in the face of the fly wheel 2. The inner face of the collar 6 is further provided with a plurality of ears 18. These ears are adapted to receive pivoted rods 19. Each of the rod members comprise a pair of sections having their adjacent ends threaded as at 20, and connected with the said threads are the turn buckles 21, by

which means the rod members may be adjusted.

The numeral 22 designates a spider which is also connected with the sleeve 4. The spider 22 comprises a central or connecting portion and a plurality of regulating arms, preferably three in number, as illustrated in Fig. 1 of the drawings, and these arms are designated by the numerals 23.

The numerals 24 designate the brake shoes of the device. Each of these brake shoes is provided with an off-set arm 25 which is pivotally connected as at- 26 with the arms 23 of the spider 22. Connecting the off-set members 25 with the arms 23 of the spider are the helical springs 27 the latter adapted to exert an inward pressure to retain the shoes 24 away from the band 3. The arms 25 are each pivotally connected with the upper member of each of the rods 19, as at 28, and from the above description, taken in connection with the drawings, it will be noted that when the collar 6, through the medium of the shifting member is slid upon the sleeve 4 toward the fly wheel 2, the rods 19 will serve to force the shoes 24 against the band 5, and a further movement of the said collar will cause the pins 15 to engage within the recesses or openings 17 of the fly wheel, thus positivelyclutohing the said flywheel. By providing the pins with the springs the said pins, while forced within their pockets in passing over the flattened outer face of the fly wheel, will be readily forced within the opening or recesses 17 of the said wheel, thus the device may be operated without danger of breaking the pins. It will, of course, be further understood that the rods 19 are arranged at an angle to the fly wheel.

By reference to the figures of the drawing, it will be noted that the cog wheel 3 has its bore formed with a plurality of recesses or depressions 30. sions do not extend entirely through the bore, so that a portion of the cog wheel may be mounted upon the outer extremity of the beaded or ribbed sleeve 5, while the remaining portion of the bore of the sleeve engages the shaft 1.

It will be apparent that when the shifting member is swung upon its pivot 12, the shoes 9 thereof, engaging with the annular enlargement provided upon the collar 6 will cause the said collar to travel upon the sleeve 4 toward the wheel 2, thus swinging the rods 19 upon their pivots to cause the brake shoes 24 to likewise swing upon their pivots and against the pressure of their springs, so as to force the said brake shoes tightly These depresinto engagement with the annular band 3 carried by the wheel 2.

Having thus fully described the said invention, what I claim is The combination with a fly wheel having a brake band and mounted upon an axle, of a ribbed sleeve loosely positioned upon the axle, a sliding collar having its bore pro vided with a plurality of recesses adapted to engage with the ribs of the sleeve, a spider mounted upon the ribbed sleeve, a plurality of brake shoes having angular arms pivotally connected with the arms of the spider, resilient means for normally retaining the brake shoes out of contact with the' brake band, angularly arranged adjustable rods connecting each of the brake shoes with the collar, the said collar being pro vided with a plurality of openings, springs within the openings, pins within the openings and adapted to be contacted and partly ejected from the openings by the springs, and the fly wheel being provided with a plurality of openings corresponding in number and arranged in register with the pins, and means for sliding the collar.

In testimony whereof I afiix my signature in presence of two witnesses.

JAMES K. MoKELVEY.

Witnesses:

J. R. PIPER, S. B. VVARNOOK.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

